Carton

ABSTRACT

A carton constructed from a rectangular blank and which includes front, rear and end walls braced relatively to each other and the bottom of the carton in a manner resisting inward or outward deflection of the front, rear or end walls intermediate their opposite ends. The carton includes double walled lower corners and inner top panels projecting horizontally outwardly from the upper edges of the end walls over which horizontal endwise extensions of the top panel of the carton lie when the top panel is closed.

United States Patent Katzenmayer et al.

[ 51 Apr. 25, 1972 [541 CARTON [72] Inventors: James H. Katzenmayer,Elkhart, Ind.;

Harry J. Rossi, Flushing, N.Y.

[73] Assignee: Continental Can Company, Inc., New

York, N.Y.

[22] Filed: Dec. 23, 1969 [21] Appl. No.2 887,581

[52] U.S. Cl ..229/33, 229/34 [5 1 1 Int. Cl [58} Field of Search..229/33, 34, 3O, 16, 8; 206/45.15

[56] References Cited UNITED STATES PATENTS 3,541,599 11/1970 Ramshaw eta1. ..229/16 D 3,010,571 11/1961 Transport ..206/45.l5

Primary Examiner-James B. Marbert AttameyDiller, Brown, Ramik & Holt[57] ABSTRACT A carton constructed from a rectangular blank and whichincludes front, rear and end walls braced relatively to each other andthe bottom of the carton in a manner resisting inward or outwarddeflection of the front, rear or end walls intermediate their oppositeends. The carton includes double walled lower corners and inner toppanels projecting horizontally outwardly from the upper edges of the endwalls over which horizontal endwise extensions of the top panel of thecarton lie when the top panel is closed.

24 Claims, 8 Drawing Figures PATENTEDAPR 2 s 1972 SHEET 1 BF 4 FIG.|

mvEmuRs JAMES H. KRYZENMEYER ozuevs PATENTEDAPR 25 1972 SHEET 2 OF 4NVEN'TDRS JHME?) H. KRTZEHMEYER G"\ Hmzwx J. QOSSl PATENTEDWRZS 1972 I3,658,235

sum 3 OF 4 INVENTURS JRMES H. KRTZENMEYER r-\ HARRY J. QGSSJ 23 $4TTQENEYS PATENTEBAPR 25 1972 3 658 23 5 INVEHTDQS JAMES H.KATZENMEYER 8rHARRY J QOSSI TTOQNEYS CARTON The carton of the instant invention may beutilized for many different purposes. As an example, the carton isparticularly well designed to contain carry-out foodstuffs in a mannerwhereby once food has been placed in the carton and the carton has beenclosed, the carton may be readily handled in one hand without excessflexure of the carton rendering it difficult to be handled.

In addition to the structure of the. carton providing a container whichmay be readily handled, the top panel section of the carton includesnovel tuck and lock tab portions that may be readily displaced into thedesired positions for locking the top panel of the carton in a closedposition after food has been placed therein. Further, the carton isconstructed in a manner whereby it may be stored in a flattenedcondition and thus stacked prior to being filled. Also, the structure ofthe carton is such that it may be readily unfolded from its flattenedcondition for placing foodstuffs therein.

In addition to the carton being readily handled after being filled andclosed, being readily closable in a manner locking the top panel of thecarton in a closed position after foodstuff has been placed within thecarton and being readily stackable inflattened condition prior to itsuse, the blank from which the carton is constructed includes three mainsections which are folded relative to each other during initial formingof the carton after the blank has been cut. Two of the main sections ofthe blank have adhesive means thereon and the only adhesive joints ofthe carton are formed as the three main sections of the blank are folded180 relative to each other into stacked superposed relation. Once thesethree main folds of the blank have been made in order to form the threeadhesive joints of the carton, the carton is complete and thereafterneeds only to be unfolded from its flattened condition immediately priorto its use.

The main object of this invention is to provide a fold-up container orcarton formed of a single struck sheet.

Another object of this invention is to provide a single struck sheet forforming a carton including three main relatively foldable sectionsthereof which are folded 180 relative to each other into superposedstack relation after apair of minor sections of the sheet or blank arefolded 180 in order to form a completed flattened carton for readysubsequent unfolding to form the desired carton.

Still another object of this invention is to provide a sheet or blank inaccordance with the preceding objects for forming a carton in which onlythree adhesive joints are utilized and which joints are automaticallyaccomplished during the folding of the two minor sections and the threemajor sections 180 relative to each other.

Still another important object of this invention is to provide a cartonwhich may be readily formed from a folded blank in a minimum of time.

Another object of this invention, in accordance with the immediatelypreceding object, is to provide a carton, which when formed, includes aswinging top panel including tuck and lock tab portions that may bereadily displaced into position locking the top panel of the containerin the closed position after foodstuffs have been placed in thecontainer.

Another important object of this invention is to provide a container,which when closed about foodstuffs contained therein, may be readilyhandled in one hand without the'container or cartonexcessively flexing.

A final object of the invention is to provide a carton in accordancewith the preceding objects which will conform to conventional forms ofmanufacture, be of simple construction and easy to use so as to providea device that will be economically feasible, long lasting and relativelytrouble free to handle.

With the above and other objects in view that will hereinafter appear,the nature of the invention will be more clearly understood by referenceto the following detailed description, the appended claimed subjectmatter, and the several views illustrated in the accompanying drawings.

IN THE DRAWINGS:

FIG. 1 is a plan view of the extended blank from which the carton of theinstant invention may be formed.

FIG. 2 is a plan view of the blank after the center pair of oppositeside sections thereof have been folded inwardly over the center sectionand one of the main end sections has been folded over the center sectionof the blank.

FIG. 3 is a perspective view of the completed carton.

FIG. 4 is a further perspective view of the completed carton as seenfrom a different angle.

FIG. 5 is a perspective view of the completed carton with the cover ortop panel thereof swung to an open position.

FIG. 6 is an end elevational view of the carton.

FIG. 7 is a rear elevational view of the carton with the rear half ofthe carton removed and one of the lock tabs of the top panel of thecarton illustrated in an unfolded position in phantom lines.

FIG. 8 is a top plan view of the carton with the top panel thereofremoved.

Referring now more specifically to the drawings, the nu meral 10generally designates the blank from which the carton of the instantinvention may be formed. The blank 10 includes three main sections A, Band C defining an outer top section, a bottom section and an inner topsection.

The outer top section A includes a top panel 12 including a frontportion 14 and a rear portion 16. The portions 14 and 16 are separatedfrom the top panel 12 by fold lines 14' and 16'. In addition, the topsection A includes a top tab 18 and a rear panel upper extension 20which are separated from the portions 14 and 16 by fold lines 18 and20'. The tab portion 18 has a pair of notches 22 formed in its free edgeportion defining a tuck tab portion 24 between the notches 22. Inaddition, the opposite ends of the tab 18 include lock tabs 26 separatedfrom the opposite ends of the tab 18 by means of fold lines 26'.

The main section B is separated from the rear panel upper extension 20of the main section A by means of a fold line 28 and includes a centralbottom panel 30. The center section 8 further includes bottom panelfront and rear extensions 32 and 34 separated from the bottom panel 30by means of fold lines 32' and 34' and the section B further includesfront and rear panels 36 and 38 separated from the extensions 32 and 34by means of fold lines 36 and 38'. The fold line 28 separates the rearpanel 38 from the rear panel upper extension 20 and it will be notedthat all of the previously referred to fold lines extend transversely ofthe blank 10. However, the section B further includes opposite endpanels 40 and 42 separated from the opposite ends of the bottom panel bymeans of fold lines 40 and 42' which extend longitudinally of the blank10 between the opposite ends of the fold line 28 and the opposite endsof a fold line 44 which separates the section B of the blank from thesection C of the blank. In addition, the opposite ends of the end panels40, 42 include corner tabs 46 defined between fold lines 46' and 46" andtuck tabs 48 are defined between each fold line 46' and the adjacent endof the corresponding longitudinal fold line 40 or 42'. Further, each ofthe tuck tabs 48 has an adhesive coating 50 thereon.

The section C includes a longitudinal slit 52 on whose opposite sides apair of inner end panels 54 and 56 are defined. Also, the section Cincludes a pair of transverse slits 58 and 60 with whose center portionsthe opposite ends of the slit 52 intersect. The section C furtherincludes a pair of short longitudinal fold lines 62 and 64 with a pairof shallow U-shaped slits 66 disposed at opposite ends of each of thefold lines 62 and 64 and transverse fold lines 68, 70, 72 and 74. Thefold lines 62 and 64 and the adjacent ends of the fold lines 70 and 72define a pair of inner top panels 76 and 78 outwardly of the inner endpanels 54 and 56 and between the fold lines 70 and 72. In addition, apair of inner top panel rear extensions 80 and 82 are defined betweencorresponding ends of the fold lines 72 and 74 outwardly of a pair ofdiagonal fold lines 84 and 86 communicating with the opposite ends ofthe slit 58 with the adjacent ends of the fold lines 62 and 64. Also, apair of rear inner panel tabs 88 and 90 are defined between the oppositeends of the slit 58 and the opposing portions of the fold line 74 andthe fold line 74 defines an inner rear panel upper extension 92extending across the free edge of the section C outwardly of the slit 58and the fold lines 84.

The end of the section C adjacent the section B includes inner top panelfront extensions 94 and 96 corresponding to the extensions 80 and 82, afront panel upper extension 98 corresponding to the rear panel upperextension 92, a pair of front inner panel tabs 100 and 102 correspondingto the tabs 88 and 90 and also a pair of opposite side inner end panelfront extensions 104 and 106 defined between the fold lines 68 and 70 onopposite sides of the slit 52. Of course, the free end portion of thesection C also includes inner end panel rear extensions 108 and 110corresponding to the extensions 104 and 106.

From FIG. 2 of the drawings it may be seen that the under surface of theinner rear panel upper extension 92 includes a coating 112 of a suitableadhesive material. And it will be further observed from FIG. 1 that thesection C includes a pair oflock tab openings 114 and 116.

With attention again invited to FIGS. 1 and 2 of the drawings, it may beseen that in initially folding the blank the opposite sides of thesection B are folded upwardly and inwardly along the fold lines 40' and42 to the dotted line position D and E. Of course, the adhesive 50adheres to the opposite ends of the front and rear panels 36 and 38 toretain the end panels 40 and 42 as well as the corner and tuck tabs infolded positions. Then, the section C is folded upwardly over thesection B exposing the adhesive layer 112 after which the section A isfolded over the section C so as to adhesively secure the rear panelupper extension over the inner rear panel upper extension 92. At thispoint, construction of the folded container is completed and it will beappreciated that the folded container, except for the opposite sideportions of the section B which comprise four thicknesses, is only threethicknesses thick.

The completed container is illustrated wholly or in part in FIGS. 3-8 ofthe drawings. In erecting the container or carton from the finallyfolded condition of the blank 10, the section A is first unfolded to theopen position after which manual pressure may be applied on the areas ofthe blank in which the fold lines 28 and 44 are formed in order to urgethese areas toward each other. This pressure will elevate the center ofthe section C relative to the center of the section B and the adjacentedge portion of the inner end panels 54 and 56 are swung downwardlyalong the fold lines 62,64 which will also cause folding along the lines84 and 86 and the corresponding unnumbered lines at the opposite ends ofthe inner end panels 54 and 56. The adjacent edges of the inner endpanels 54 and 56 are swung downwardly until the inner end panels 54 and56 are vertically disposed with their free edge portions abuttingagainst the upper surface of the bottom panel 30 and the bottom panelextensions 32 and 34. As the inner end panels 54 and 56 are swungdownwardly, folding will occur along the fold lines 68, 70, 72 and 74 soas to form generally trough shaped end walls opening toward each other.In addition, as the free edges of the inner end panels 54 and 56 areswung downwardly and the inner top panels 76 and 78 are elevated abovethe section B, the rear and front panel upper extensions 20 and 98 willbe unfolded relative to the rear and front panels 38 and 36 and the endpanels 40 and 42 will be unfolded from the opposite sides of the bottompanel 30. Also, the comer tabs 46 are unfolded along fold lines 46' and46" and are slightly bowed at the adjacent opposite end portions of thefold lines 36' and 38' as the inner end panels 54 and 56 reach theirfully erected positions. The carton, which is generally designated bythe reference numeral 120, is now fully erected and may have the desiredfoodstuffs placed therein after which the section A may be swung fromits open position illustrated in FIG. 5 of the drawings over the innertop panels 76 and 78 and have the tuck tab portion 24 inserted behindthe central portion of the front panel upper extension 98.

Thereafter, the lock tabs 26 may be folded downwardly and inwardly underthe opposite ends of the front panel upper extension 76 and engaged inthe lock tab openings 114 and 116. In this manner, the top panel 12 ofthe carton is securely fastened in a closed position.

With attention now invited to the comer portions of the carton 120illustrated in FIGS. 3-5 of the drawings, it will be seen that thecorner tabs 46 and the end panels 40 and 42 of the blank 10 back andbrace the outside surfaces of the inner end panels 54 and 56 as well asthe inner end panel rear and front extensions 108, 110, 104 and 106.Further, it will be noted that the opposite ends of the top panel 12overlie and are braced by the inner top panels 76 and 78 of the sectionC when the top panel 12 is in its closed position.

In review, the blank 10 is rectangular in configuration and therefore aplurality of the blanks 10 may be formed from a single roll of panelmaterial with very little wastage. In addition, after the adhesive 50and 112 has been placed in position, all that is necessary to form thecollapsed container is to fold the opposite side portions of the sectionB disposed outwardly of the fold lines 40 and 42 inwardly and overadjacent marginal portions of the section B. Then, the section C ismerely folded over the section B and the section A is folded over thesection C. Further, the carton 120 may be readily formed from the foldedblank 10 and the top panel 12 may be readily secured in the closedposition by means of the tuck tab portion 24 and the lock tab 26.

While preferred forms and arrangements of parts have been shown inillustrating the invention, it is to be clearly understood that variouschanges in details and arrangement of parts may be made withoutdeparting from the spirit and scope of this disclosure.

We claim:

1. A carton including a bottom wall interconnecting a pair of opposingfront and rear walls, upper marginal edge portions of said pair of wallsincluding extensions folded over said bottom wall in spaced relationthereto and over each other in superposed relation to form inner andouter top walls, said inner top wall including central portions thereoffolded downwardly and away from each other to upstanding positionsdefining end panels for said carton, the forward edge portion of saidouter top wall defines a lap tab overlying the outer surface of theupper marginal portion of said front wall, said upper marginal portionincluding a low central portion and said lap tab including a pair oflongitudinally spaced notches formed therein opening outwardly of thefree edge of said tab defining a tuck tab therebetween, said tuck tabbeing inserted behind and inwardly of said low central portion.

2. The carton of claim 1 wherein the opposite end corner portions of thefront marginal edge portion of said inner top wall project outwardbeyond the opposite ends of the front wall and the opposite end cornerportions of the front marginal edge portion of said outer top wallinclude lock tabs bent downward and inward beneath said inner top wallcorner portions.

3. The carton of claim 2 wherein said lock tabs are carried by theopposite ends of said lap tab.

4. An elongated carton-forming blank comprising an integral foldablepanel including longitudinally aligned center and opposite end sectionsfoldable relative to each other along main fold lines extendingtransversely of the blank, adjacent portions of said center and oppositeend sections disposed on opposite sides of said fold lines includingrelatively foldable transverse strips for upstanding disposition whenthe end sections are successively folded over the center section, saidcenter section including a pair of opposite side inwardly foldablemarginal portions whose opposite ends are securable to the underlyingside areas of said center section beneath the side marginal edges of theend sections when folded, the upper surface of the free edge portion ofthe first folded over end section being securable to the base edgeportion of the second folded over end section and the first folded overend section includes swingable central flap portions to be swungdownwardly and away from each other for forming inner wall panelsextending between corresponding side portions of the second folded endsection, the transverse strips and the center section when the first andsecond folded end sections are displaced upwardly above the centersection and the strips are swung to upstanding positions extendingbetween the base edge portions of said end sections and the underlyingedge portions of said center section.

5. The carton of claim 4 wherein said inwardly foldable marginalportions of said center section are swingable to upstanding positionsprojecting upwardly from said center section as said end sections areelevated relative to said center section.

6. An elongated carton-forming blank comprising an integral foldablepanel including longitudinally aligned center and opposite end sectionsfoldable relative to each other along main fold lines extendingtransversely of the blank, the adjacent marginal edge portions of saidsections each including a pair of transverse strips separated from eachother and the remainder of the corresponding section by means oftransverse fold lines and the free marginal portions of said endsections each also including a pair of transverse strips separated fromeach other and the remainder of the corresponding section by means oftransverse fold lines, said end sections being successively foldablealong said main fold lines over said center section in stacked relationthereto, the opposite side edge portions of said center sectionincluding longitudinal inwardly foldable panels whose opposite endsoverlie the opposite ends of the endmost strips of said center sectionwhen folded for securement to said endmost strip ends and the endmoststrip of one of said end sections, to be first folded over said centersection, being disposed for securement to the strip of the other endsection closest to the corresponding main fold line when said other endsection is folded over said one end section, said one end sectionincludes a center longitudinal slit formed therein terminating at themidportions of a pair of opposite end transverse slits formed in saidone end section generally centrally intermediate the opposite sides ofthe strip adjacent said center section at the base end of said one endsection and centrally intermediate the opposite sides of the endmoststrip at the free end of said one end section, the ends of saidtransverse strips terminating inwardly of the opposite ends of thecorresponding slits and the portions of said one panel disposed onopposite sides of said longitudinal slit being foldable downwardly,after said one section is folded over said center section, along foldlines connecting the corresponding ends of said transverse slits to formupstanding panels extending between said one end section and said centersection when the former is elevated relative to the latter.

7. A carton including a bottom wall interconnecting a pair of opposingfront and rear walls, upper marginal edge portions of said pair of wallsincluding extensions folded over said bottom wall in spaced relationshipthereto and over each other in superposed relationship to form inner andouter top walls, said inner top wall including central portions thereoffolded downwardly and away from each other to upstanding portionsdefining end panels of said carton, end walls extending between saidfront and rear walls at opposite ends of said bottom wall, and said endwalls being outboard of said end panels thereby backing up the same tolimit movement of said end panels away from each other,

8. The carton as defined in claim 7 wherein said end panels are in partdefined by a common l-shaped cut line.

9. The carton as defined in claim 7 wherein said end panels are in partdefined by a common l-shaped cut line defined by a pair of spaced armsand an interconnecting leg, and said legs are disposed in said front andrear walls.

10. The carton as defined in claim 7 wherein said end panels are in partdefined by a common I-shaped cut line, and each end panel includes apair of fold lines inboard of and generally parallel to spaced arms ofsaid I-shaped out line.

11. The carton as defined in claim 7 wherein a corner is defined byadjacent ends of said rear, front and end walls, and

each corner is formed at least in part by corner panel means joined toan associated rear or front wall and its adjacent end wall by fold linemeans.

12. The carton as defined in claim 7 wherein a corner is defined byadjacent ends of said rear, front and end walls, each comer includes atleast a pair of fold lines in part defining a triangular panel, and eachtriangular panel is folded inwardly into the carton about one of saidpair of fold lines into adjacent generally parallel relationship to saidfront and rear walls.

13. The carton as defined in claim 7 wherein a comer is defined byadjacent ends of said rear, front and end walls, each comer includes atleast a pair of fold lines in part defining a retention panel, eachretention panel is folded inwardly into the carton about one of saidpair of fold lines into adjacent generally parallel relationship to saidfront and rear walls, and adhesive means for adhering said retentionpanels to said front and rear walls whereby outward movement of said endwalls is precluded.

14. The carton as defined in claim 9 wherein each end panel includes apair of fold lines inboard of and generally parallel to said arms,portions of said inner top wall outboard of said central portions havingfold lines aligned with said pairs of fold lines, and said outer topwall has fold lines in superposed aligned relationship with said innertop wall fold lines.

15. The carton as defined in claim 9 wherein each end panel includes apair of fold lines inboard of and generally parallel to said arms.

16. The carton as defined in claim 11 wherein said end panels are inpart defined by a common l-shaped cut line.

17. The carton as defined in claim 12 wherein said end panels are inpart defined by a common I-shaped out line.

18. The carton as defined in claim 12 wherein said end panels are inpart defined by a common l-shaped out line defined by a pair of spacedarms and an interconnecting leg, and said legs are disposed in saidfront and rear walls.

19. The carton as defined in claim 12 wherein said end panels are inpart defined by a common I-shaped cut line, and each end panel includesa pair of fold lines inboard of and generally parallel to spaced arms ofsaid l-shaped out line.

20. The carton as defined in claim 13 wherein said end panels are inpart defined by a common l-shaped cut line defined by a pair of spacedarms and an interconnecting leg, and said legs are disposed in saidfront and rear walls.

21. The carton as defined in claim 13 wherein said end panels are inpart defined by a common l-shaped cut line, and each end panel includesa pair of fold lines inboard of and generally parallel to spaced arms ofsaid l-shaped out line.

22. The carton as defined in claim 20 wherein each end panel includes apair of fold lines inboard of and generally parallel to said arms,portions of said inner top wall outboard of said central portions havingfold lines aligned with said pairs of fold lines, and said outer topwall has fold lines in superposed aligned relationship with said innertop wall fold lines.

23. An elongated carton-forming blank comprising a bottom panel set-offby a first pair of fold lines in generally spaced parallel relationshipto eachother and a second pair of fold lines in generally spacedparallel relationship to each other and normal to said first pair offold lines, a front panel joined by one of said first pair of fold linesto said bottom panel, a rear panel joined by the other of said firstpair of fold lines to said bottom panel, a pair of end walls joined oneeach to said bottom panel by said second pair of fold lines, said endwalls having connecting end portions outboard of said first pair of foldlines and being foldable into overlying relationship to said front andrear panels about said second pair of fold lines, each connecting endportion having a fold line with the fold lines of the same end wallbeing in outwardly diverging relationship, said blank further includingat least one top panel having a generally I-shaped cut line thereindefining a pair of end panels, said [shaped out line being defined by apair of spaced arms and an interconnecting leg, and said leg is ingenerally parallel relationship to said second pair of fold lines.

24 The carton-forming blank as defined in claim 23 including a pair offold lines in each and panel inboard of said arms.

1. A carton including a bottom wall interconnecting a pair of opposingfront and rear walls, upper marginal edge portions of said pair of wallsincluding extensions folded over said bottom wall in spaced relationthereto and over each other in superposed relation to form inner andouter top walls, said innEr top wall including central portions thereoffolded downwardly and away from each other to upstanding positionsdefining end panels for said carton, the forward edge portion of saidouter top wall defines a lap tab overlying the outer surface of theupper marginal portion of said front wall, said upper marginal portionincluding a low central portion and said lap tab including a pair oflongitudinally spaced notches formed therein opening outwardly of thefree edge of said tab defining a tuck tab therebetween, said tuck tabbeing inserted behind and inwardly of said low central portion.
 2. Thecarton of claim 1 wherein the opposite end corner portions of the frontmarginal edge portion of said inner top wall project outward beyond theopposite ends of the front wall and the opposite end corner portions ofthe front marginal edge portion of said outer top wall include lock tabsbent downward and inward beneath said inner top wall corner portions. 3.The carton of claim 2 wherein said lock tabs are carried by the oppositeends of said lap tab.
 4. An elongated carton-forming blank comprising anintegral foldable panel including longitudinally aligned center andopposite end sections foldable relative to each other along main foldlines extending transversely of the blank, adjacent portions of saidcenter and opposite end sections disposed on opposite sides of said foldlines including relatively foldable transverse strips for upstandingdisposition when the end sections are successively folded over thecenter section, said center section including a pair of opposite sideinwardly foldable marginal portions whose opposite ends are securable tothe underlying side areas of said center section beneath the sidemarginal edges of the end sections when folded, the upper surface of thefree edge portion of the first folded over end section being securableto the base edge portion of the second folded over end section and thefirst folded over end section includes swingable central flap portionsto be swung downwardly and away from each other for forming inner wallpanels extending between corresponding side portions of the secondfolded end section, the transverse strips and the center section whenthe first and second folded end sections are displaced upwardly abovethe center section and the strips are swung to upstanding positionsextending between the base edge portions of said end sections and theunderlying edge portions of said center section.
 5. The carton of claim4 wherein said inwardly foldable marginal portions of said centersection are swingable to upstanding positions projecting upwardly fromsaid center section as said end sections are elevated relative to saidcenter section.
 6. An elongated carton-forming blank comprising anintegral foldable panel including longitudinally aligned center andopposite end sections foldable relative to each other along main foldlines extending transversely of the blank, the adjacent marginal edgeportions of said sections each including a pair of transverse stripsseparated from each other and the remainder of the corresponding sectionby means of transverse fold lines and the free marginal portions of saidend sections each also including a pair of transverse strips separatedfrom each other and the remainder of the corresponding section by meansof transverse fold lines, said end sections being successively foldablealong said main fold lines over said center section in stacked relationthereto, the opposite side edge portions of said center sectionincluding longitudinal inwardly foldable panels whose opposite endsoverlie the opposite ends of the endmost strips of said center sectionwhen folded for securement to said endmost strip ends and the endmoststrip of one of said end sections, to be first folded over said centersection, being disposed for securement to the strip of the other endsection closest to the corresponding main fold line when said other endsection is folded over said one end section, said one end secTionincludes a center longitudinal slit formed therein terminating at themidportions of a pair of opposite end transverse slits formed in saidone end section generally centrally intermediate the opposite sides ofthe strip adjacent said center section at the base end of said one endsection and centrally intermediate the opposite sides of the endmoststrip at the free end of said one end section, the ends of saidtransverse strips terminating inwardly of the opposite ends of thecorresponding slits and the portions of said one panel disposed onopposite sides of said longitudinal slit being foldable downwardly,after said one section is folded over said center section, along foldlines connecting the corresponding ends of said transverse slits to formupstanding panels extending between said one end section and said centersection when the former is elevated relative to the latter.
 7. A cartonincluding a bottom wall interconnecting a pair of opposing front andrear walls, upper marginal edge portions of said pair of walls includingextensions folded over said bottom wall in spaced relationship theretoand over each other in superposed relationship to form inner and outertop walls, said inner top wall including central portions thereof foldeddownwardly and away from each other to upstanding portions defining endpanels of said carton, end walls extending between said front and rearwalls at opposite ends of said bottom wall, and said end walls beingoutboard of said end panels thereby backing up the same to limitmovement of said end panels away from each other.
 8. The carton asdefined in claim 7 wherein said end panels are in part defined by acommon I-shaped cut line.
 9. The carton as defined in claim 7 whereinsaid end panels are in part defined by a common I-shaped cut linedefined by a pair of spaced arms and an interconnecting leg, and saidlegs are disposed in said front and rear walls.
 10. The carton asdefined in claim 7 wherein said end panels are in part defined by acommon I-shaped cut line, and each end panel includes a pair of foldlines inboard of and generally parallel to spaced arms of said I-shapedcut line.
 11. The carton as defined in claim 7 wherein a corner isdefined by adjacent ends of said rear, front and end walls, and eachcorner is formed at least in part by corner panel means joined to anassociated rear or front wall and its adjacent end wall by fold linemeans.
 12. The carton as defined in claim 7 wherein a corner is definedby adjacent ends of said rear, front and end walls, each corner includesat least a pair of fold lines in part defining a triangular panel, andeach triangular panel is folded inwardly into the carton about one ofsaid pair of fold lines into adjacent generally parallel relationship tosaid front and rear walls.
 13. The carton as defined in claim 7 whereina corner is defined by adjacent ends of said rear, front and end walls,each corner includes at least a pair of fold lines in part defining aretention panel, each retention panel is folded inwardly into the cartonabout one of said pair of fold lines into adjacent generally parallelrelationship to said front and rear walls, and adhesive means foradhering said retention panels to said front and rear walls wherebyoutward movement of said end walls is precluded.
 14. The carton asdefined in claim 9 wherein each end panel includes a pair of fold linesinboard of and generally parallel to said arms, portions of said innertop wall outboard of said central portions having fold lines alignedwith said pairs of fold lines, and said outer top wall has fold lines insuperposed aligned relationship with said inner top wall fold lines. 15.The carton as defined in claim 9 wherein each end panel includes a pairof fold lines inboard of and generally parallel to said arms.
 16. Thecarton as defined in claim 11 wherein said end panels are in partdefined by a common I-shaped cut line.
 17. The carton as defined inclaim 12 wherein said end panels are in part defined by a commonI-shaped cut line.
 18. The carton as defined in claim 12 wherein saidend panels are in part defined by a common I-shaped cut line defined bya pair of spaced arms and an interconnecting leg, and said legs aredisposed in said front and rear walls.
 19. The carton as defined inclaim 12 wherein said end panels are in part defined by a commonI-shaped cut line, and each end panel includes a pair of fold linesinboard of and generally parallel to spaced arms of said I-shaped cutline.
 20. The carton as defined in claim 13 wherein said end panels arein part defined by a common I-shaped cut line defined by a pair ofspaced arms and an interconnecting leg, and said legs are disposed insaid front and rear walls.
 21. The carton as defined in claim 13 whereinsaid end panels are in part defined by a common I-shaped cut line, andeach end panel includes a pair of fold lines inboard of and generallyparallel to spaced arms of said I-shaped cut line.
 22. The carton asdefined in claim 20 wherein each end panel includes a pair of fold linesinboard of and generally parallel to said arms, portions of said innertop wall outboard of said central portions having fold lines alignedwith said pairs of fold lines, and said outer top wall has fold lines insuperposed aligned relationship with said inner top wall fold lines. 23.An elongated carton-forming blank comprising a bottom panel set-off by afirst pair of fold lines in generally spaced parallel relationship toeach other and a second pair of fold lines in generally spaced parallelrelationship to each other and normal to said first pair of fold lines,a front panel joined by one of said first pair of fold lines to saidbottom panel, a rear panel joined by the other of said first pair offold lines to said bottom panel, a pair of end walls joined one each tosaid bottom panel by said second pair of fold lines, said end wallshaving connecting end portions outboard of said first pair of fold linesand being foldable into overlying relationship to said front and rearpanels about said second pair of fold lines, each connecting end portionhaving a fold line with the fold lines of the same end wall being inoutwardly diverging relationship, said blank further including at leastone top panel having a generally I-shaped cut line therein defining apair of end panels, said I-shaped cut line being defined by a pair ofspaced arms and an interconnecting leg, and said leg is in generallyparallel relationship to said second pair of fold lines.
 24. Thecarton-forming blank as defined in claim 23 including a pair of foldlines in each end panel inboard of said arms.